Angelo's is cash and takeout only. This is where Leigh had her first ever cheesesteak. They're so good, she's vowed it's the ONLY place she'll go to for a cheesesteak. However, there are other great cheesesteak spots such as Jim's on 4th and South (Open until 4 am) and Sonny's (228 Market St)
Put on your walking shoes and explore all the history of the city. We recommend walking to Rittenhouse Square (lunch at Parc and explore the Farmer's Market on Saturday morning), tour Independence Hall (skip the Liberty Bell), and check out the Philadelphia Museum of Art (pay homage to Rocky).
Just do not wear Red Sox gear.
Reservations recommended. Honorable Mentions: Reading Terminal Market (closed on Sundays) and Sabrina's Café (multiple locations, no reservations needed).